Following his death, Stanley’s body was examined by medical experts and in addition to the fracture to his skull, he was found to have sustained 32 fractures to his ribs and nine fractures to his arms and legs that were caused on more than one earlier occasion.

Carl Anderson, of the CPS, said ‘The CPS presented evidence to the court including CCTV, telephone logs and medical records from doctors and nurses who saw Stanley and medical experts who provided evidence in relation to his injuries.

‘During post-natal appointments and check-ups, Davis and Davies gave medical staff the impression there were no problems with Stanley and only reported difficulties in getting him to take his milk.

‘The reality was quite different. Both knew Stanley had already suffered serious injuries but neither said anything, leaving Stanley without the medical attention he desperately needed.

‘Both the defendants denied killing Stanley but it was clear from all the evidence that one of them had caused the horrific head injury that killed him.

‘The other was, or should have been aware, that there was a risk of serious harm to Stanley because of the multiple fractures he had already suffered but instead of doing something to prevent anything further happening to him, they did nothing.